Some quick thoughts about online play:
I play a lot of online brawl against very capable opponents, and through my experiences I have concluded that WIFI SUCKS. And I still play it mostly because it's still fun sometimes and I don't have much irl competition atm. Does it help, yes, but you often can't get into the technical aspects of the game; at least, you can't take things at face value. I have enough experience and knowledge offline (I have a smash mentor that plays at a pro level offline and helps me out, plus training mode and offline tournaments and the rare good connection) to know what should happen. Online helped me greatly with general strategies and mindgames, however. And since college apps are done, I'll be going to a lot more offline tournies in the upcoming months. The truth is, you can never be sure that an online brawl is accurate. Once I was playing teams and it came down to my friend and someone else in a 1v1. He dsmashed and dthrew Sonic at 150% and it DIDN'T KO. I forget if we won. Another time I had an orange connection and the opponent had no lag. This individual believed that the character's bair could get out of Ike's standard a combo. However, when it was tested w/o lag this proved false. People don't realize how much it affects the course of a game. Sometimes I wonder why Sakurai put in a L and R button when I play online, I can't dodge a darn thing. I never miss a lightning kick that I try to hit (i.e. not used for spacing/mindgames/etc.) offline. Let's say a lightning kick fails b/c of lag and then I get hit into a string of attacks (lol combos in Brawl) because I can't dodge, then get KO'd. Or, a more concrete example, if I miss into DDD's fsmash. Seriously, it affects everything. The outcome may or may not be accurate, but the one thing that is certain is that the WAY we got there would NOT be the same offline. Of course, there are times when it is OBVIOUS that someone is better, even online. But at higher levels, that doesn't work.
But I digress, this isn't the point of the thread. =P
Edit: The Sonic deal was with Charizard on FD. That's kinda an important fact that I left out.